Cisco SFP-10G-BX20D Compatible 10GBASE-BX20-D BiDi SFP+ 1330nm-TX/1270nm-RX 20km DOM Simplex LC SMF Transceiver Module

Overview

Streamline your network infrastructure with the SFP-10G-BX20D Compatible transceiver. This Bidirectional (BiDi) SFP+ module is engineered to transmit and receive 10 Gigabit Ethernet signals over a single strand of Single-Mode Fiber (SMF), effectively cutting your cabling requirements in half.

Designed for mid-range distances, the SFP-10G-BX20D covers links up to 20 kilometers, bridging the gap between standard 10km optics and expensive 40km long-haul modules. It transmits data at the 1330nm wavelength and receives at 1270nm, requiring a complementary SFP-10G-BX20U module at the other end of the link.

Key Features

• Bidirectional Operation: Enables simultaneous Tx and Rx on one fiber utilizing WDM technology.
• Wavelength Configuration: Transmits at 1330nm / Receives at 1270nm.
• Medium Range Reach: Optimized for distances up to 20km on 9/125µm SMF.
• Connector: Simplex LC interface (Single fiber).
• Digital Diagnostics: Built-in DDM/DOM for monitoring optical power, voltage, and temperature.
• Standards Compliance: MSA Compliant and electrically compatible with SFP+ 10G standards.

Applications

The SFP-10G-BX20D is ideal for scenarios where fiber is limited or leasing costs are high:

• Metro Area Networks (MAN): Connecting distribution nodes across a city where 10km is too short but 40km is overkill.
• Campus Interlinks: Connecting buildings on large university or corporate campuses using a single fiber strand.
• ISP Point-to-Point: Delivering dedicated 10G services to business clients with minimal fiber usage.
• Security & Surveillance: Backhauling high-bandwidth IP camera traffic from remote locations.

Specifications

Cross-Platform Compatibility

Our 10GBASE-BX20D modules are programmed to function seamlessly with equipment that supports MSA-standard transceivers. While “BX20” is not a standard part number for every major OEM (many skip from 10km to 40km), this module is coded to be recognized as a valid 10G transceiver in platforms such as:

Advantages

The 20km rating of this module offers a distinct advantage in optical budgeting. Standard 10km modules may fall short on links that are 12-15km long, while 40km modules might require attenuators to prevent receiver overload on those same links. The SFP-10G-BX20D hits the “sweet spot,” providing sufficient power for mid-range links without the risk of damaging receivers on slightly shorter runs.

FAQ (Technical & Product Questions)

1. Which module is the partner for this unit?

You must pair the SFP-10G-BX20D with the SFP-10G-BX20U. The “D” module transmits at 1330nm, so the partner “U” module must receive at 1330nm (and transmit at 1270nm).

2. Can I use this with a 10km or 40km BiDi module?

It is generally not recommended. While wavelengths might match (e.g., a BX40U also receives at 1330nm), the power levels and sensitivities differ. Mixing distances can lead to packet loss or receiver damage. Always pair 20km with 20km.

3. What type of fiber connector do I need?

You need a Simplex LC connector. This module uses a single port for both sending and receiving. Standard patch cables are usually Duplex (two strands joined); you can simply separate them and use one strand.

4. Do I need an attenuator?

For a 20km module, you typically do not need an attenuator unless the link is extremely short (e.g., <1km test loops). The Tx power is moderate enough that it rarely overloads the receiver, unlike 40km or 80km optics.

5. Is this module hot-swappable?

Yes, this SFP+ transceiver is hot-swappable. You can install or remove it while the switch is powered on without disrupting the rest of the device.